Systems and methods for managing the distribution and access of data on a pool of storage media are disclosed. The data are managed based on access patterns, storage media activity, and/or health parameters. An access pattern of one or more units of data in a pool of two or more storage media is determined. At least a portion of the one or more units of data are migrated from one storage medium to another storage medium within the pool of two or more storage media based on the access pattern. Systems and methods are also disclosed for storing data on several different disk storage sets according to different qualities.